//
// Created by 紫霄 on 2020/5/1.
//

#ifndef LEETCODE_68_II_H
#define LEETCODE_68_II_H
#include <stack>
#include <vector>
using namespace std;
struct TreeNode {
  int val;
  TreeNode *left;
  TreeNode *right;
  TreeNode(int x) : val(x), left(nullptr), right(nullptr) {}
};
class Solution {

};
#endif // LEETCODE_68_II_H
